best 426 after market parts

the426master

I put a FMFpowercore 4 silencer and rejetted it and that’s the only hop up I've done to it and that gave it so much more torque, midrange, and top end power. But now that I’ve gotten use to it I would like more response and torque, I’m thinking of camming it has anybody put cams in theirs and if so what do you think.

byggd

You can install an 03 YZ450 ex cam but you have to make sure to YZ time it. Not only does it give you more zip but you can remove you decompress lever because it will then have anto-decompress you can also do the other free mods (air box lid, disconnect the grey wire etc)

wrkaholic

On the 426, YZ timing is a free mod, you just change the exhaust cam timing. I loved the change on my '02 426. I did not notice any loss of low end, but, I did notice a big hit on the top end. For me the decomp lever is no big deal. I am not motivated to spend money on a new cam just for that, but, if you stall during a race, I can see how the extra few seconds can help.